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Tag: "history" at biology news

Ancient trans-Atlantic swarm brought locusts to the New World

...rial DNA sequences to reconstruct the evolutionary history of the Schistocerca locusts. The team found that the desert locust lineage gave rise to the more than 50 Schistocerca species found in the western hemisphere. ...

The shape of things to come: Morphology database going global

...ity researcher who specializes in the evolutionary history of wasps is now creating a buzz about a new way for scientists to store, share and study plant and animal images. Fredrik Ronquist, a professor in the School of Computational Sciences, is one of the founders of MorphBank, an international Web databa...

Newly discovered birdlike dinosaur is oldest raptor ever found in South America

...ossils that tells a bigger story about the Earth's history and the timing of evolutionary events," says Makov...idence for a more global distribution and a longer history for dromaeosaurs than was previously known, but also suggests that dromaeosaurs on northern and sout...

Fish evolve a longer lifespan by evolving a longer reproductive period, researchers find

...Trinidad. In their analysis, they divided the life history into three non-overlapping segments: the age at maturity (birth to first reproduction), the reproductive lifespan (first to last reproduction) and the post-reproductive lifespan (last reproduction to death). They also devised a statistical criterion...

Getting an evolutionary handle on life after reproduction

...olution works selectively on those aspects of life history that directly affect fitness. They expand on their ongoing investigations of the life history of guppies confronting different predatory threats in Trinidad. Individuals facing different mortali...

Gene therapy may protect normal tissues during radiation retreatment for lung cancer

...will lead to a radical rethink of the evolutionary history of Antarctica as the work challenges all the accepted theories. The scientists argue that shallow water animals were retreating to the deep ocean and then returning to recolonise Antartica's shelf seas. Clues to how these two very different communiti...

Seafloor creatures destroyed by ice action during ice ages

...will lead to a radical rethink of the evolutionary history of Antarctica as the work challenges all the accepted theories. The scientists argue that shallow water animals were retreating to the deep ocean and then returning to recolonise Antartica's shelf seas. Clues to how these two very different communiti...

The earliest animals had human-like genes

...parisons of the genetic code and read evolutionary history from it. An international consortium involving researchers from EMBL, the UK, France and the United States has now sequenced a part of the Platynereis genome. "The fraction of Platynereis genes we have been able to look at tells a very clear story," ...

Past illegal blood donation in China linked to hepatitis C virus infection

...es the risk of HCV infection than those who had no history of blood transfusion. Among the 538 villagers, 22 percent had a history of selling blood or plasma; from village to village, the rates ranged from 9 percent to 49 percent. ...

A bug's life: Exceptional genomic stability yet rapid protein evolution in a carpenter ant mutualist

... previously described for the 150-200 million-year history of Buchnera, an aphid mutualist. Taken together, t...hese lineage-specific differences may reflect life history differences of their respective ant hosts. When the observations of the current study are coupled w...

Restaurant seafood prices since 1850s help plot marine harvests through history

...thers, and 1,000 or more in a few," he says. "The history of marine animal populations is a blind spot in human knowledge being filled by the combined efforts of historians, paleo-ecologists, and ecosystem modelers. Helping visualize the past, now almost unimaginable richness of the oceans could inspire and...

Prenatal exposure to marine toxin causes lasting damage

...acid on movement and working memory. Rats with a history of domoic acid exposure showed greater initial activity in a maze test than control rats, followed by a rapid decline. Moreover, domoic acid exposure affected cognitive function in complex ways, the researchers reported. Toxin exposure decreased th...

Researcher says flu responders can learn from 1918 epidemic

...gins, who came to Lehigh after earning his B.A. in history and sociology at St. Vincent's College and his M.A. in history at Duquesne University, has spent the last several years combing through old coroner's reports, news...

On a wing and a prayer - Alaska researchers seek clues to bird flu

...t UAF. "Our ability to combine studies in natural history and biomedicine is why I came to UAF," Runstadler said. "We are best able to do this type of research at UAF because we have the expertise in biological and ecological science, the state resources, and now the biomedical capabilities." ...

Biologists Crack Genetic Code for Specialized Spider Silk

...d relatives with CVID or IgA deficiency reported a history of recurrent infections and were also found to have low levels of IgA and/or low levels of another type of antibody, immunoglobulin G (IgG). TACI mutations interfere with two aspects of the immune response that involve maturation of B cells. Normall...

Agreement will speed research on microbicides for women

...d relatives with CVID or IgA deficiency reported a history of recurrent infections and were also found to have low levels of IgA and/or low levels of another type of antibody, immunoglobulin G (IgG). TACI mutations interfere with two aspects of the immune response that involve maturation of B cells. Normall...

Human brain is still evolving

...hat show evidence of selection in the evolutionary history of the human species and that also show evidence of ongoing selection in humans." Lahn emphasized that it would not be correct to interpret the findings as indicating that one ethnic group is more "evolved" than another. Any differences among groups...

Defective Gene Linked to Two Inherited Immune Deficiencies

...d relatives with CVID or IgA deficiency reported a history of recurrent infections and were also found to have low levels of IgA and/or low levels of another type of antibody, immunoglobulin G (IgG). TACI mutations interfere with two aspects of the immune response that involve maturation of B cells. Normall...

'Patient-choice' C-section rate rises 36%: HealthGrades study

...in the years 2001, 2002 and 2003 for women with no history of C-sections. The study covers deliveries in the 17 states that release this data. When extrapolated to the nation, the study shows that 267,340 "patient-choice" C-sections were performed over those three years. These 17 states represent approximat...

Studies clarify risk factors for mother-to-child transmission of hepatitis C virus

...section delivery, infant prematurity, and maternal history of injection drug use were not associated with HCV transmission. The overall rate of transmission of the virus from infected mother to child was 6.2 percent in the European study and 3.6 percent in the U.S. study. "Our results strongly suggest tha...

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